Antigenic fluids do not cause direct effects on the body. They do not cause damage to the body without significant ingestion or exposure. Antigenic fluids are specialized fluids used in nucleic acid testing or antigen testing that can be used in combination with collected body fluid specimens to determine the presence or absence of pathogen infection. Antigenic fluids are mainly composed of glycine, sodium chloride or purified water, and do not cause direct irritation to the body. During normal exposure to antigenic liquid, the amount of antigenic liquid that the body comes into contact with is small, so it will not cause irritation to the surface of the body or the mucous membranes of the respiratory tract. However, if the body is exposed to too much antigenic liquid at one time or if it is consumed directly, it will build up a toxic and harmful dose in the body, thus causing physical damage, so it is sufficient to control the amount of exposure. In the process of contact with antigenic liquid need to do a good job of personal protection, try to avoid one-time exposure to too much, should be used under the guidance of a doctor.